EVOLUTION-MANAGER

Edit File: inv.cpp

/****************************************************************************** * Project: PROJ.4 * Purpose: Inverse operation invocation * Author: Thomas Knudsen, thokn@sdfe.dk, 2018-01-02 * Based on material from Gerald Evenden (original pj_inv) * and Piyush Agram (original pj_inv3d) * ****************************************************************************** * Copyright (c) 2000, Frank Warmerdam * Copyright (c) 2018, Thomas Knudsen / SDFE * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. *****************************************************************************/ #include <errno.h> #include <math.h> #include "proj_internal.h" #include <math.h> #define INPUT_UNITS P->right #define OUTPUT_UNITS P->left static PJ_COORD inv_prepare (PJ *P, PJ_COORD coo) { if (coo.v[0] == HUGE_VAL || coo.v[1] == HUGE_VAL || coo.v[2] == HUGE_VAL) { proj_errno_set (P, PJD_ERR_INVALID_X_OR_Y); return proj_coord_error (); } /* The helmert datum shift will choke unless it gets a sensible 4D coordinate */ if (HUGE_VAL==coo.v[2] && P->helmert) coo.v[2] = 0.0; if (HUGE_VAL==coo.v[3] && P->helmert) coo.v[3] = 0.0; if (P->axisswap) coo = proj_trans (P->axisswap, PJ_INV, coo); /* Handle remaining possible input types */ switch (INPUT_UNITS) { case PJ_IO_UNITS_WHATEVER: return coo; /* de-scale and de-offset */ case PJ_IO_UNITS_CARTESIAN: coo.xyz.x *= P->to_meter; coo.xyz.y *= P->to_meter; coo.xyz.z *= P->to_meter; if (P->is_geocent) { coo = proj_trans (P->cart, PJ_INV, coo); } return coo; case PJ_IO_UNITS_PROJECTED: case PJ_IO_UNITS_CLASSIC: coo.xyz.x = P->to_meter * coo.xyz.x - P->x0; coo.xyz.y = P->to_meter * coo.xyz.y - P->y0; coo.xyz.z = P->vto_meter * coo.xyz.z - P->z0; if (INPUT_UNITS==PJ_IO_UNITS_PROJECTED) return coo; /* Classic proj.4 functions expect plane coordinates in units of the semimajor axis */ /* Multiplying by ra, rather than dividing by a because the CalCOFI projection */ /* stomps on a and hence (apparently) depends on this to roundtrip correctly */ /* (CalCOFI avoids further scaling by stomping - but a better solution is possible) */ coo.xyz.x *= P->ra; coo.xyz.y *= P->ra; return coo; case PJ_IO_UNITS_RADIANS: coo.lpz.z = P->vto_meter * coo.lpz.z - P->z0; break; } /* Should not happen, so we could return pj_coord_err here */ return coo; } static PJ_COORD inv_finalize (PJ *P, PJ_COORD coo) { if (coo.xyz.x == HUGE_VAL) { proj_errno_set (P, PJD_ERR_INVALID_X_OR_Y); return proj_coord_error (); } if (OUTPUT_UNITS==PJ_IO_UNITS_RADIANS) { /* Distance from central meridian, taking system zero meridian into account */ coo.lp.lam = coo.lp.lam + P->from_greenwich + P->lam0; /* adjust longitude to central meridian */ if (0==P->over) coo.lpz.lam = adjlon(coo.lpz.lam); if (P->vgridshift) coo = proj_trans (P->vgridshift, PJ_INV, coo); /* Go geometric from orthometric */ if (coo.lp.lam==HUGE_VAL) return coo; if (P->hgridshift) coo = proj_trans (P->hgridshift, PJ_FWD, coo); else if (P->helmert || (P->cart_wgs84 != nullptr && P->cart != nullptr)) { coo = proj_trans (P->cart, PJ_FWD, coo); /* Go cartesian in local frame */ if( P->helmert ) coo = proj_trans (P->helmert, PJ_FWD, coo); /* Step into WGS84 */ coo = proj_trans (P->cart_wgs84, PJ_INV, coo); /* Go back to angular using WGS84 ellps */ } if (coo.lp.lam==HUGE_VAL) return coo; /* If input latitude was geocentrical, convert back to geocentrical */ if (P->geoc) coo = pj_geocentric_latitude (P, PJ_FWD, coo); } return coo; } static PJ_COORD error_or_coord(PJ *P, PJ_COORD coord, int last_errno) { if (proj_errno(P)) return proj_coord_error(); proj_errno_restore(P, last_errno); return coord; } PJ_LP pj_inv(PJ_XY xy, PJ *P) { int last_errno; PJ_COORD coo = {{0,0,0,0}}; coo.xy = xy; last_errno = proj_errno_reset(P); if (!P->skip_inv_prepare) coo = inv_prepare (P, coo); if (HUGE_VAL==coo.v[0]) return proj_coord_error ().lp; /* Do the transformation, using the lowest dimensional transformer available */ if (P->inv) coo.lp = P->inv(coo.xy, P); else if (P->inv3d) coo.lpz = P->inv3d (coo.xyz, P); else if (P->inv4d) coo = P->inv4d (coo, P); else { proj_errno_set (P, EINVAL); return proj_coord_error ().lp; } if (HUGE_VAL==coo.v[0]) return proj_coord_error ().lp; if (!P->skip_inv_finalize) coo = inv_finalize (P, coo); return error_or_coord(P, coo, last_errno).lp; } PJ_LPZ pj_inv3d (PJ_XYZ xyz, PJ *P) { int last_errno; PJ_COORD coo = {{0,0,0,0}}; coo.xyz = xyz; last_errno = proj_errno_reset(P); if (!P->skip_inv_prepare) coo = inv_prepare (P, coo); if (HUGE_VAL==coo.v[0]) return proj_coord_error ().lpz; /* Do the transformation, using the lowest dimensional transformer feasible */ if (P->inv3d) coo.lpz = P->inv3d (coo.xyz, P); else if (P->inv4d) coo = P->inv4d (coo, P); else if (P->inv) coo.lp = P->inv (coo.xy, P); else { proj_errno_set (P, EINVAL); return proj_coord_error ().lpz; } if (HUGE_VAL==coo.v[0]) return proj_coord_error ().lpz; if (!P->skip_inv_finalize) coo = inv_finalize (P, coo); return error_or_coord(P, coo, last_errno).lpz; } PJ_COORD pj_inv4d (PJ_COORD coo, PJ *P) { int last_errno = proj_errno_reset(P); if (!P->skip_inv_prepare) coo = inv_prepare (P, coo); if (HUGE_VAL==coo.v[0]) return proj_coord_error (); /* Call the highest dimensional converter available */ if (P->inv4d) coo = P->inv4d (coo, P); else if (P->inv3d) coo.lpz = P->inv3d (coo.xyz, P); else if (P->inv) coo.lp = P->inv (coo.xy, P); else { proj_errno_set (P, EINVAL); return proj_coord_error (); } if (HUGE_VAL==coo.v[0]) return proj_coord_error (); if (!P->skip_inv_finalize) coo = inv_finalize (P, coo); return error_or_coord(P, coo, last_errno); }